<template>
  <div class="comp-full-calendar">
    <!-- header pick month -->
    <fc-header
      :current-month="currentMonth"
      :first-day="firstDay"
      :locale="locale"
      :typesof="typesof"
      @change="emitChangeMonth"
    >
      <div slot="header-left">
        <slot name="fc-header-left"></slot>
      </div>

      <div slot="header-right">
        <slot name="fc-header-right"></slot>
      </div>
    </fc-header>
    <!-- body display date day and events -->
    <div class="full-calendar-body">
      <div class="weeks">
        <!-- 周一到周五 -->
        <strong
          class="week"
          v-for="dayIndex in 7"
          :key="dayIndex.value"
          :style="{display}"
        >{{ (dayIndex-2) | localeWeekDay(firstDay, locale) }}</strong>
      </div>
      <div class="dates" ref="dates">
        <div class="dates-bg">
          <div class="week-row" v-for="week in currentDates" :key="week.value">
            <div
              class="day-cell"
              v-for="day in week"
              :key="day.value"
              :class="{'today' : day.isToday,
              'not-cur-month' : !day.isCurMonth}"
              :style="{height}"
            >
              <!-- 这个月的天数 -->
              <p class="day-number">{{ day.monthDay }}</p>
            </div>
          </div>
        </div>

        <!-- absolute so we can make dynamic td -->
        <!-- 可以制作动态td -->
        <div class="dates-events">
          <div class="events-week" v-for="week in currentDates" :key="week.value">
            <div
              class="events-day"
              v-for="day in week"
              :key="day.value"
              track-by="$index"
              :class="{'today' : day.isToday,
              'not-cur-month' : !day.isCurMonth}"
              @click.stop="dayClick(day, $event)"
              :style="{height}"
            >
              <p class="day-number">{{day.monthDay}}</p>
              <div class="event-box">
                <event-card
                  :event="event"
                  :typesof="typesof"
                  :date="day.date"
                  :firstDay="firstDay"
                  v-for="event in day.events"
                  :key="event.key"
                  v-show="event.cellIndex <= eventLimit&&typesof==0||event.cellIndex <= eventLimits&&typesof==1||event.cellIndex <= eventLimits&&typesof==2"
                  @click="eventClick"
                >
                  <template slot-scope="p">
                    <slot name="fc-event-card" :event="p.event"></slot>
                  </template>
                </event-card>
                <p
                  v-if="day.events.length > eventLimit&&typesof==0"
                  class="more-link"
                  @click.stop="selectThisDay(day, $event)"
                >+ {{day.events[day.events.length -1].cellIndex - eventLimit}}条</p>
                <p
                  v-if="day.events.length > eventLimits&&typesof==1||day.events.length > eventLimits&&typesof==2"
                  class="more-link"
                  @click.stop="selectThisDay(day, $event)"
                >+ {{day.events[day.events.length -1].cellIndex - eventLimits}}条</p>
              </div>
            </div>
          </div>
        </div>

        <!-- full events when click show more -->
        <!-- 点击时显示更多完整事件 -->
        <div
          class="more-events"
          v-show="showMore"
          :style="{left: morePos.left + 'px', top: morePos.top + 'px'}"
        >
          <div class="more-header">
            <span class="title">{{ moreTitle(selectDay.date) }}</span>
            <span class="close" @click.stop="showMore = false">x</span>
          </div>
          <div class="more-body">
            <ul class="body-list">
              <li
                v-for="event in selectDay.events"
                :key="event.value"
                v-show="event.isShow"
                class="body-item"
                @click="eventClick(event, $event)"
              >{{event.title}}</li>
            </ul>
          </div>
        </div>

        <slot name="body-card"></slot>
      </div>
    </div>
  </div>
</template>
<script >
import dateFunc from "./dateFunc";
import weekFunc from "./weekFunc";
import dayFunc from "./dayFunc";
import moment from "moment";
import EventCard from "./eventCard.vue";
import header from "./header.vue";

export default {
  props: {
    events: {
      type: Array,
      default: function() {
        return [];
      }
    },
    locale: {
      type: String,
      default: "zh-cn"
    },
    firstDay: {
      type: [Number, String],
      validator(val) {
        let res = parseInt(val);
        return res >= 0 && res <= 6;
      },
      default: 0
    },
    typesof: {
      type: Number,
      default: 0
    }
  },
  watch: {
    typesof(v) {
      this.changetype(v);
    }
  },
  components: {
    "event-card": EventCard,
    "fc-header": header
  },
  mounted() {
    this.changetype(this.typesof);
    // this.emitChangeMonth(this.currentMonth);
  },
  data() {
    return {
      currentMonth: moment().startOf("day"),
      isLismit: true,
      eventLimit: 3,
      eventLimits: 6,
      showMore: false,
      morePos: {
        top: 0,
        left: 0
      },
      selectDay: {},
      height: "112px",
      display: "block",
      heightk: "112px"
    };
  },
  computed: {
    currentDates() {
      if (this.typesof == 0) {
        return this.getCalendar();
      } else if (this.typesof == 1) {
        return this.getCalendars();
      } else if (this.typesof == 2) {
        return this.getCalendarss();
      }
      return [];
    }
  },
  methods: {
    changetype(v) {
      switch (v) {
        case 0:
          this.height = "112px";
          this.display = "block";
          break;
        case 1:
          this.height = "672px";
          this.display = "block";
          break;
        case 2:
          this.height = "672px";
          this.display = "none";
          break;
      }
    },
    time(v) {
      // console.log( moment(moment(v).format("YYYY-MM-DD")).startOf("day"))
      this.currentMonth = moment(moment(v).format("YYYY-MM-DD")).startOf("day");
    },
    emitChangeMonth(firstDayOfMonth) {
      this.currentMonth = firstDayOfMonth;
      if (this.typesof == 0) {
         let start = dateFunc.getMonthViewStartDate(
        firstDayOfMonth,
        this.firstDay
      );
      let end = dateFunc.getMonthViewEndDate(firstDayOfMonth, this.firstDay);
       this.$emit("changeMonth", start, end, firstDayOfMonth);
      } else if (this.typesof == 1) {
        let start = weekFunc.getMonthViewStartDate(
        firstDayOfMonth,
        this.firstDay
      );
      let end = weekFunc.getMonthViewEndDate(firstDayOfMonth, this.firstDay);
      this.$emit("changeMonth", start, end, firstDayOfMonth);
      } else if (this.typesof == 2) {
        let start = dayFunc.getMonthViewStartDate(
        firstDayOfMonth,
        this.firstDay
      );
      let end = dayFunc.getMonthViewEndDate(firstDayOfMonth, this.firstDay);
      this.$emit("changeMonth", start, end, firstDayOfMonth);
      }
      
    },
    moreTitle(date) {
      if (!date) return "";
      return moment(date).format("ll");
    },
    // 日历42个格子
    getCalendar() {
      let monthViewStartDate = dateFunc.getMonthViewStartDate(
        this.currentMonth,
        this.firstDay
      );
      let calendar = [];
      // 排
      for (let perWeek = 0; perWeek < 6; perWeek++) {
        let week = [];
        // 列
        for (let perDay = 0; perDay < 7; perDay++) {
          week.push({
            // 42天从那号开始
            monthDay: monthViewStartDate.date(),
            // 现在是几号
            isToday: monthViewStartDate.isSame(moment(), "day"),
            //上个月几天尾巴
            isCurMonth: monthViewStartDate.isSame(this.currentMonth, "month"),
            weekDay: perDay,
            date: moment(monthViewStartDate),
            events: this.slotEvents(monthViewStartDate)
          });
          // 一天一天排列
          monthViewStartDate.add(1, "day");
        }

        calendar.push(week);
      }
      return calendar;
    },
    //周
    getCalendars() {
      let monthViewStartDate = weekFunc.getMonthViewStartDate(
        this.currentMonth,
        this.firstDay
      );
      let calendar = [];
      // 排
      for (let perWeek = 0; perWeek < 1; perWeek++) {
        let week = [];
        // 列
        for (let perDay = 0; perDay < 7; perDay++) {
          week.push({
            // 42天从那号开始
            monthDay: monthViewStartDate.date(),
            // 现在是几号
            isToday: monthViewStartDate.isSame(moment(), "day"),
            //上个月几天尾巴
            isCurMonth: monthViewStartDate.isSame(this.currentMonth, "month"),
            weekDay: perDay,
            date: moment(monthViewStartDate),
            events: this.slotEvents(monthViewStartDate)
          });
          // 一天一天排列
          monthViewStartDate.add(1, "day");
        }

        calendar.push(week);
      }
      return calendar;
    },
    //天
    getCalendarss() {
      let monthViewStartDate = dayFunc.getMonthViewStartDate(
        this.currentMonth,
        this.firstDay
      );
      let calendar = [];
      // 排
      for (let perWeek = 0; perWeek < 1; perWeek++) {
        let week = [];
        // 列
        for (let perDay = 0; perDay < 1; perDay++) {
          week.push({
            // 42天从那号开始
            monthDay: monthViewStartDate.date(),
            // 现在是几号
            isToday: monthViewStartDate.isSame(moment(), "day"),
            //上个月几天尾巴
            isCurMonth: monthViewStartDate.isSame(this.currentMonth, "month"),
            weekDay: perDay,
            date: moment(monthViewStartDate),
            events: this.slotEvents(monthViewStartDate)
          });
          // 一天一天排列
          monthViewStartDate.add(1, "day");
        }

        calendar.push(week);
      }
      return calendar;
    },
    slotEvents(date) {
      // find all events start from this date
      // 查找所有事件从此日期开始
      // let cellIndexArr = [];
      let thisDayEvents = this.events.filter(day => {
        let st = moment(new Date(day.start).toLocaleDateString(), "YYYY-MM-DD");
        let ed = moment(st);

        return date.isBetween(st, ed, null, "[]");
      });
      // sort by duration
      //按持续时间排序
      thisDayEvents.sort((a, b) => {
        if (!a.start) return 1;
        if (!b.start) return -1;
        return a.start - b.start;
      });

      // mark cellIndex and place holder
      // 标记cellIndex和占位符
      for (let i = 0; i < thisDayEvents.length; i++) {
        thisDayEvents[i].cellIndex = thisDayEvents[i].cellIndex || i + 1;
        thisDayEvents[i].isShow = true;
      }

      return thisDayEvents;
    },
    selectThisDay(day, jsEvent) {
      this.selectDay = day;
      this.showMore = true;
      this.morePos = this.computePos(event.target);
      this.morePos.top -= 100;
      let events = day.events.filter(item => {
        return item.isShow == true;
      });
      this.$emit("moreClick", day.date, events, jsEvent);
    },
    computePos(target) {
      let eventRect = target.getBoundingClientRect();
      let pageRect = this.$refs.dates.getBoundingClientRect();
      return {
        left: eventRect.left - pageRect.left,
        top: eventRect.top + eventRect.height - pageRect.top
      };
    },
    dayClick(day) {
      this.$emit("dayClick", day.date);
    },
    eventClick(event, jsEvent) {
      if (!event.isShow) return;

      jsEvent.stopPropagation();
      let pos = this.computePos(jsEvent.target);
      this.$emit("eventClick", event, jsEvent, pos);
    }
  },
  filters: {
    localeWeekDay(weekday, firstDay, locale) {
      firstDay = parseInt(firstDay);
      const localMoment = moment().locale(locale);
      return localMoment.localeData().weekdaysShort()[(weekday + firstDay) % 7];
    }
  }
};
</script>
<style lang="scss" scoped>
.comp-full-calendar {
  // font-family: "elvetica neue", tahoma, "hiragino sans gb";
  padding: 20px;
  background: #fff;
  max-width: 960px;
  margin: 0 auto;
  ul,
  p {
    margin: 0;
    padding: 0;
  }
}

.full-calendar-body {
  margin-top: 20px;
  .weeks {
    display: flex;
    border-top: 1px solid #e0e0e0;
    border-bottom: 1px solid #e0e0e0;
    border-left: 1px solid #e0e0e0;
    .week {
      flex: 1;
      text-align: center;
      border-right: 1px solid #e0e0e0;
    }
  }
  .dates {
    position: relative;
    .week-row {
      // width: 100%;
      // position:absolute;
      border-left: 1px solid #e0e0e0;
      display: flex;
      //每个格子的高度
      .day-cell {
        flex: 1;
        min-height: 112px;
        padding: 4px;
        border-right: 1px solid #e0e0e0;
        border-bottom: 1px solid #e0e0e0;
        .day-number {
          text-align: right;
        }
        &.today {
          background-color: #fcf8e3;
        }
        &.not-cur-month {
          .day-number {
            color: rgba(0, 0, 0, 0.24);
          }
        }
      }
      // 周
      // .day-cell{
      //   flex:1;
      //   min-height: 672px;
      //   padding:4px;
      //   border-right:1px solid #e0e0e0;
      //   border-bottom:1px solid #e0e0e0;
      // .day-number{
      //   text-align: right;
      // }
      // &.today{
      //    background-color:#fcf8e3;
      //  }
      // &.not-cur-month{
      // .day-number{
      //   color:rgba(0,0,0,.24);
      // }
      // }
      // }
    }
    .dates-events {
      position: absolute;
      top: 0;
      left: 0;
      z-index: 1;
      width: 100%;
      .events-week {
        display: flex;
        .events-day {
          cursor: pointer;
          flex: 1;
                  // height: 121px;//////////////////////////////////////////////////////////////////////////////
          overflow: hidden;
          text-overflow: ellipsis;
          .day-number {
            text-align: right;
            padding: 4px 5px 4px 4px;
            opacity: 0;
          }
          &.not-cur-month {
            .day-number {
              color: rgba(0, 0, 0, 0.24);
            }
          }
          .event-box {
            .event-item {
              cursor: pointer;
              font-size: 12px;
              // background-color:#C7E6FD;
              margin-bottom: 2px;
              color: rgba(0, 0, 0, 0.87);
              padding: 0 5px 0 4px;
              height: 18px;
              line-height: 18px;
              white-space: nowrap;
              overflow: hidden;
              text-overflow: ellipsis;
              &.is-start {
                margin-left: 4px;
                // border-top-left-radius:4px;
                // border-bottom-left-radius:4px;
              }
              &.is-end {
                margin-right: 4px;
                // border-top-right-radius:4px;
                // border-bottom-right-radius:4px;
              }
              &.is-opacity {
                opacity: 0;
              }
            }
            .more-link {
              cursor: pointer;
              // text-align: right;
              padding-left: 8px;
              padding-right: 2px;
              color: rgba(0, 0, 0, 0.38);
              font-size: 14px;
            }
          }
        }
      }
    }
    .more-events {
      position: absolute;
      width: 150px;
      z-index: 2;
      border: 1px solid #eee;
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
      .more-header {
        background-color: #eee;
        padding: 5px;
        display: flex;
        align-items: center;
        font-size: 14px;
        .title {
          flex: 1;
        }
        .close {
          margin-right: 2px;
          cursor: pointer;
          font-size: 16px;
        }
      }
      .more-body {
        height: 146px;
        overflow: hidden;
        .body-list {
          height: 144px;
          padding: 5px;
          overflow: auto;
          background-color: #fff;
          .body-item {
            cursor: pointer;
            font-size: 12px;
            background-color: #c7e6fd;
            margin-bottom: 2px;
            color: rgba(0, 0, 0, 0.87);
            padding: 0 0 0 4px;
            height: 18px;
            line-height: 18px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
          }
        }
      }
    }
  }
}
</style>